I've got 2 small bolt down deck pieces here, Airex foam core. System III Silvertip. Piece shown, from inside out is 1800, 10 ounce cloth 2x. Hand layup. I do it one layer at a time, allow to cure, then next. Product has a 72 hour no sand bonding window, I never go over 24. It's cool here, 40 F...